Shear machine



2 Sheets-Sheet 1 WIN/e65 Jul 12, 1932. B RN 1,867,205

SHEAR MACHIN E Filed Jan. 51:, 1929 2 SheetsSheef 2 Fiver/667 @wyw. 80WM? Patented July 12, 1932 t I 11 it Q 11 P U I-Tn 1 STATES OFFICE vADOIL-IPH BORN; F LAwRnnen, MAssAeLtUsETTs i i sHEAn MAcfi'fnn A liation filed Jenuaryfil, 1929; snr im na f a The present inventionrelates to shear me is indicated at 38.-

25sthe dee chines; Y time between the-blade end the; rest'is' ne'CesLThe object of the; present inventi n is to 's er ilysniall; the 'zs'egeofi the se arnthrough provide a; shear niachine by which the shear"the eylinderywoutd esult in" severenceef the cylinder and blade areautcmatically reclcth- It is-thefeforenecessarythattheop 55 movedfroincontact with the fabric upon the crater depress the" teat fed 36 estheseafn approach of a seam 0r imperfection in the approache the cylinder;-thus' mi singi the cloth. 1 c V cylinder cut of cont'actwith theclethendTothis end, the invention consists of the permittin the sealni' te passthrcl'igh en-c.

"1 1 sheet machine hereinafter" described and par- According t'o' this}usual mode of opere-tien',

'ticnlarly defined in the claims, :51 eefisidefzthle' bnrdenviepl'stcedon the vi gie In the accompanying, drawings, Fig. "I .is lanceOftheo pirfitgf? Cpnsidefabl'ewastag'e aside elevation of so'n iu'ch'ofthe shear rnais caiis'e'd bythe fact 'th'at an cpei'sitonj will 1 chineasisnecessary tc a'i'riye at anunder- 'usnztily'reisc thejcylinder tooearl-yin; order I5 standingef the present ii'iv'ention; Fig. 2 is a t e"a sure free p'efssgtgecff theseam iinder'the '65 front elevation 01":the machine; Fig. 3 is a b1ede-. Moreover; cens te;nt'sittendainceisfnec 7 detail plan View of the feeler; Fig; 4' is aessai y, and aneperatc'n reqifired foi-eech detail View of the switchmechanis'nisrin the machine; 5,; I I s I open pcsition; Figg5 is'aviewsirniltir to Fig. According tQ-:'the present invention; prelon ismade tori auteinztticelly' lifting the 70 and Fig. 6' is a; wirindiagram of the elec? cylinder and blade at: zigpredeteimi-ned time'trictticonnections, V Y the appfoach ezfi the} semn toward the Theil'lusti'atedembodiment of the in en- To" this" end, there is pi'bii'dedz a ti'on cdmp'rises wsheal 'machine having a nt0i 40'c0nnectedbytlw0fn1'42anda-w0rm.

frame 8, a sheen" cylinder 10 provided with geztnt l with; ttcztin shaft46I'extendingaci0ss 75 7 the usual helical cutters, and' a; shearb1adel2 the ffQI it cf the machine directly above the whichc'c'opei"ates with the cylinder to cut the 'de pressernod 36. JMQunt edn th mm shaft ofthecloth The cylinder and made are is itcznn 48? whichengages" with a; cam: plat'e mountedin supporting arms 14 which are 500ji-thedep1 ess01i Automatic mechanism jicurnstled in bearin s 16.' Thecylinder is is einp'leyed for impaftingra;single revolution "5? drivenby any usual means (not shown). to'the can; shztft'up'onepprdach of: a;seam- "The cloth I8- p'alsses between bfnsh foils" 22 to'w'ztidtheeyl'ilri'fiefc.- 1

and 24' and over idler rolls 20 and 26 t01the This zifitern aticmechanisnrcomprises"aidere'stf28 which presents the cloth accuratelyteeter cf feeIer indicated 'gefifau'y, at 521 r to the cylinderand-blade. In order to permit nicfinteddirectl y shove thepositiening1:011

seams 0r imperfections in the cloth to; pass 26-; The feel-enc'c'mpri-ses aashaft 6r? rod 54 through the machine without being cut bythe j'onpnsfled epiesite' sidesf ofthe trams. cylinder, provisionismad'e for raising-the havingmdeme thereon an angle ironlsup- Vcylinder andhladeby turning the suppor'ting ort 56 t6 which is secured afiee'ler plate. 58

iilmsllflllithir Piv t i f en the which-lies'directlyiin the rea'i'jof:the cloth, rear-end of each arm 14 isconnected by a link ve -yearlyteuching the cloth in the normal 30 with alever 32 whichis piyoted at 84in e Jefetti-dn of the machine-,- asnd so ztrr anged the frame.- Thefront ends of the levers 32 that the pi-esnceieigsgg mwifltwfnthefeele'n are connected at the fi ont of the machine by ibdii-ito the;pesiticn shown 'in Figa'hf; As a afoot depressor red 36. 1 7 matter cthddttidnal pfecemtion, pair 01 i The machine thus far, described issimilar feeleffl'eepstfi)"aremennted at cpposi'teends to that commonlyused for the pur'pds'e of off thegfeelera sembly; Each l'ocp' GQicemshearing textile goods. Ino eration, the pfise's ewireIcep'ettechedtealbiock '62ronthe cIoth 18 consists in a; numberef lengths" of feelefpl'a'te; Aeshown Fig; 3,; the-1o'o'p cloth which are united by seems oneof which c0nip'risstwc vpzi i 'eti lel lengths of wire septhe positionshown in Fig. 5.

arated by a distance only slightly greater than the normal thickness ofthe cloth'and so arranged that a seam engaging the rearward length ofwire will also rotate the feeler into Rotation of the feeler i to theposition of Fig. is utilizedto close an electrical switch indicatedgenerally at 63. This switch comprises a contact arm 64 secured toacollar 66 on the feeler shaft and carrying an electrical contact 68which is adapted to engage a con tact 70 mounted on an arm 72. The arm72 is pivoted at 74 on a bracket 76 attached to" the frame. -A spring 78normally holds the arm 7 2 in the position shown in Fig. 4. The switch63 comprising thecontacts .68 and 70 is momentarily closed upon thepassage of solenoid 82 of a magnetic relay switch 84.

This switch is a double pole switch'ofany usual form having movablecontact members 86'and 88.. Upon closureof the relay switch,

a circuit is closed from the line throughthe pole 86 and thearmature 90of the motor and another circuit isclosed through the pole same fieldwinding, 92 of the motor. and the speed controlling field rheostat 94.The motor therefore starts turning the shaft 46.

Provision .is madeupon initiation ofthero- "tationrof. the shaft 46 toclose a parallellcir- :cuit through the motor inorder to maintain themotor in operation for acomplete revolutionlofthe cam shaft- .This isnecessarybecause of the fact that the feelenswitch ;63 "is onlymomentarily closedduring the passage of the seam through the feeler.Accordingly,

a crankrrod 96 is'pivotedin a co1lar.98 fixed to the end of the-shaft,thecrankfrod being adjust ably connected by a block 100 with a switchactuating rod .102 which controls the operation oftheswing contactswitch'104.

As shown in Figs. 4 and 5', the switch104 has a fixed contact,106 and amovable contact 108, the latter being normallyl maintained in a positionout of engagement with the fixed contact by aninsulating head 110 ontheend I 9 of the. rod 102; 1A spring 112 normally tends to close theswitch. As .the camshaft'46 starts to rotate,the rod 102' is retractedinto; the position shown in Fig; 5,-thereby. permitting the switch104 toclose and complete a circuit .from the line through the switch 104,

V thej pole 88 of. the magneticswitch and the armature and field of themotor. It will be seen that although the engagement of the. a seam withthefeeler is of short duration, the

closing of the feelerswitch 63 extends over -a' suflicient period topermit the switch 104 to -c'0nnect1on, it will, be seen that the p votedbeclosed. by operation of the motor. In this inderand blade. 7

arrangement of the feeler switch contact arm 72 is of importance becauseafter closure of the feeler switch as shown in Fig. 5, the switch isheld closed during the return of the contacts 68 and to their originalposition, the

length of time required for this return being a sufficient topermit themotor to be brought 1I1t0 operatlon to close the switch 104. At

some time after the switch 104 has been closed 7 and before the camshaft makes a complete, revolution, the feeler switch will open, but themotor circuit is then closed'through'the switch 104.

. The motor having been started by the engagement of a seam with thefeeler, it will continue to operatefor a complete revolution of the camshaft. 'lhecam 48depressesv the plate 50, thereby lifting the cylinderand blade fromv the cloth. *The speed ofthernotor is so adjusted thatthe seam will'have barely sufficient time to pass over the rest beforecompletion of a single revolution of the cam. .At 'theiend of therevolution of the shaft, the cylinder and blade are returned to normalposition and theirod 102 is restored to its original position, therebylifting'the contact arm 108 and opening the switch. 104.

The switch, being thus opened, de-energizes thesolenoid 82 and cuts'oifthe current to the motor, leaving the mechanism in readiness foroperation upon passage offanother'seam' toward the cylinder. a Amanually operated main switch 114 is included in one side of the line. i

In Order to indicate, the numberfof ant s, of operation. of theliftingmechanisima counter 116 is operatedby the movements of the rod 102. I Asshown in Figs; land 2, the

counter comprises a stationary plate118 having aislngle display openingto show a nu- The rear plate is mounted on a shaft 122 to which secureda ratchet 124. A pawl, 126 mounted on the rod 102 engages the ratchetand is adapted to advance the ratchet byi ,onetooth upon each rotationof the cam shaft.

It'will be seenthat the present invention not only eliminates thenecessity for constant attendance, onthe machine, but also possesses isautomatically raised at a-predetermined time in the passage of thecloth, the operation may be gauged to cause a minimumwast'age "ofunshearedgoods, Moreover, passage of and which might'not be observed bythe operator, will render the mechanism operative to "raise thecylinder; i It will be understood, that the term fab ric? .is not tobeconsidered as limited to a textile fabric, butincludes any materialhaving a surface adapted to be sheared by a shearcylmcral marked on arotatingrear plate 120..

the advantage that inasmuch as the cylinder any imperfections, whichmightbe of sufii- 'cient thickness to; cause cutting of the cloth,

The invention having been thus described, what is claimed is:

l. A shear machine comprising a shear cylinder and blade, a feeleradapted to be engaged by a seam or imperfection in the material to besheared, a feeler switch associated with the feeler, a motor, means forstarting the motor upon closin of the feeler switch, a cam associatedwith t e motor, connections between the cam and the shear cylinder andblade for lifting the cylinder and blade out of engagement with thematerial, a crank associated with the motor, a motor switch adapted tobe closed upon movement of the crank, a counter associated with thecrank, the motor switch being adapted to be opened by the crank uponcompletion of a single revolution of the cam.

2. A shear machine comprising a shear cyl inder and blade, a manuallyoperable device to lift the shear cylinder and blade, a feeler adaptedto be engaged by a seam in the material to be sheared, a feeler switchassociated with the feeler, a motor independent of the drive for themachine, means for starting the motor upon closing of the feeler switch,a cam driven by the motor, connections between the cam and the manuallyoperable device for lifting the cylinder and blade out of engagementwith the material, a crank associated with the motor, and .a motorswitch adapted to be closed upon initial movement of the crank and to beopened by the crank upon completion ofa single revolution of the cam.

In testimony whereof I have signed my name to this specification.

ADOLPH BORN.

